diff --git a/gap-orb.changes b/gap-orb.changes
index 75ce69e..23eb540 100644
--- a/gap-orb.changes
+++ b/gap-orb.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Tue Aug 27 15:52:56 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 4.9.1
+  * More hash functions now detect invalid input and return
+    `fail` instead of returning garbage (like hashes of random
+    memory blocks, or the constant 0) or even crashing.
+
 -------------------------------------------------------------------
 Sun Feb 12 11:00:43 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/gap-orb.spec b/gap-orb.spec
index 5e533c6..b744183 100644
--- a/gap-orb.spec
+++ b/gap-orb.spec
@@ -17,29 +17,28 @@
 
 
 Name:           gap-orb
-Version:        4.9.0
+Version:        4.9.1
 Release:        0
 Summary:        GAP: Methods to enumerate Orbits
 License:        GPL-3.0-or-later
 Group:          Productivity/Scientific/Math
 URL:            https://gap-packages.github.io/orb
-
 #Git-Clone:	https://github.com/gap-packages/orb
 Source:         https://github.com/gap-packages/orb/releases/download/v%version/orb-%version.tar.gz
 BuildRequires:  autoconf
 BuildRequires:  automake
-BuildRequires:  gap-devel >= 4.9
+BuildRequires:  gap-devel >= 4.12
 BuildRequires:  gap-rpm-devel
 BuildRequires:  gmp-devel
 BuildRequires:  libtool
-Requires:       gap-core >= 4.9
+Requires:       gap-core >= 4.12
 Suggests:       gap-io >= 3.3
 
 %description
 The orb package is about enumerating orbits in various ways.
 
 %prep
-%setup -qn orb-%version
+%autosetup -n orb-%version
 
 %build
 ./configure --with-gaproot="%gapdir"
diff --git a/orb-4.9.0.tar.gz b/orb-4.9.0.tar.gz
deleted file mode 100644
index 4ce339d..0000000
--- a/orb-4.9.0.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a1f81707743cbbf5eddecf0b195293b308987f17c7795690c65b5e4a92dfbc1f
-size 988847
diff --git a/orb-4.9.1.tar.gz b/orb-4.9.1.tar.gz
new file mode 100644
index 0000000..0e3719c
--- /dev/null
+++ b/orb-4.9.1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:747b963f1125b51244b279ed090f2a15d480d88beb4782b1ae0307fbc3daed8a
+size 1016673